Global Patent Index - EP 4090014 A4

EP 4090014 A4 20240103 - ENCODING METHOD, DECODING METHOD, ENCODER, DECODER, AND STORAGE MEDIUM

Title (en)

ENCODING METHOD, DECODING METHOD, ENCODER, DECODER, AND STORAGE MEDIUM

Title (de)

CODIERUNGSVERFAHREN, DECODIERUNGSVERFAHREN, CODIERER, DECODIERER UND SPEICHERMEDIUM

Title (fr)

PROCÉDÉ DE CODAGE, PROCÉDÉ DE DÉCODAGE, CODEUR, DÉCODEUR, ET SUPPORT DE STOCKAGE

Publication

EP 4090014 A4 20240103 (EN)

Application

EP 20912114 A 20201229

Priority

  • US 202062958582 P 20200108
  • CN 2020141080 W 20201229

Abstract (en)

[origin: EP4090014A1] An encoding method, a decoding method, an encoder, a decoder, and a storage medium are provided. The method includes the following. A prediction parameter of a current block is determined, where the prediction parameter includes a prediction mode parameter. Neighbouring sample values of the current block are obtained and matrix-based intra prediction (MIP) input sample values of the current block are determined according to the neighbouring sample values of the current block, when the prediction mode parameter indicates that an MIP mode is used to determine an intra prediction value of a chroma component of the current block. An MIP prediction value of the chroma component of the current block is determined according to the MIP input sample values, an MIP weighting matrix, and a shifting parameter. The intra prediction value of the chroma component of the current block is determined by filtering the MIP prediction value. A prediction residual value of the chroma component of the current block is determined according to the intra prediction value of the chroma component of the current block. A low-frequency non-separable transform (LFNST) parameter is determined by performing an LFNST on the prediction residual value. The LFNST parameter is encoded and the encoded LTNST parameter is signalled into a bitstream.

IPC 8 full level

H04N 19/105 (2014.01); H04N 19/11 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/423 (2014.01); H04N 19/593 (2014.01)

CPC (source: CN EP KR US)

H04N 19/105 (2014.11 - EP US); H04N 19/11 (2014.11 - CN EP KR); H04N 19/12 (2014.11 - EP); H04N 19/132 (2014.11 - US); H04N 19/159 (2014.11 - US); H04N 19/176 (2014.11 - EP KR US); H04N 19/186 (2014.11 - EP KR US); H04N 19/423 (2014.11 - KR); H04N 19/593 (2014.11 - KR); H04N 19/60 (2014.11 - KR); H04N 19/61 (2014.11 - EP); H04N 19/70 (2014.11 - KR); H04N 19/82 (2014.11 - KR)

Citation (search report)

  • [I] KARAM NASER (INTERDIGITAL) ET AL: "CE6 Related: MIP Adaptation On Top of CE6-1.1d", no. JVET-P0349, 24 September 2019 (2019-09-24), XP030217022, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/16_Geneva/wg11/JVET-P0349-v1.zip JVET-P0349.docx> [retrieved on 20190924]
  • [A] PFAFF (FRAUNHOFER) J ET AL: "CE3: Affine linear weighted intra prediction (CE3-4.1, CE3-4.2)", no. JVET-N0217, 25 March 2019 (2019-03-25), XP030256694, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/14_Geneva/wg11/JVET-N0217-v3.zip JVET-N0217_v1.docx> [retrieved on 20190325]
  • [A] SCHAFER MICHAEL ET AL: "An Affine-Linear Intra Prediction With Complexity Constraints", 2019 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP), IEEE, 22 September 2019 (2019-09-22), pages 1089 - 1093, XP033647670, DOI: 10.1109/ICIP.2019.8803724
  • [A] VAN DER AUWERA (QUALCOMM) G ET AL: "CE3: Summary Report on Intra Prediction and Mode Coding", no. JVET-P0023 ; m50550, 2 October 2019 (2019-10-02), XP030216034, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/16_Geneva/wg11/JVET-P0023-v2.zip JVET-P0023-v2.docx> [retrieved on 20191002]
  • [A] J-Y HUO ET AL: "Non-CE3: MIP simplification", no. JVET-P0136 ; m50090, 4 October 2019 (2019-10-04), XP030216338, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/16_Geneva/wg11/JVET-P0136-v3.zip JVET-P0136-v2.pptx> [retrieved on 20191004]
  • [A] J-Y HUO ET AL: "On fixed sW and fO in MIP", no. JVET-Q0450 ; m52046, 31 December 2019 (2019-12-31), XP030223547, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/17_Brussels/wg11/JVET-Q0450-v1.zip JVET-Q0450-v1/JVET-Q0450-v1.docx> [retrieved on 20191231]
  • [A] KUMAR (CHOSUN) A ET AL: "LFNST restriction based on MIP", no. JVET-Q0380 ; m51975, 31 December 2019 (2019-12-31), XP030223371, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/17_Brussels/wg11/JVET-Q0380-v1.zip JVET-Q0380.docx> [retrieved on 20191231]
  • [A] KOO (LGE) M ET AL: "CE6: Reduced Secondary Transform (RST) (CE6-3.1)", no. JVET-N0193, 27 March 2019 (2019-03-27), XP030256928, Retrieved from the Internet <URL:http://phenix.int-evry.fr/jvet/doc_end_user/documents/14_Geneva/wg11/JVET-N0193-v5.zip RST_N0193.pptx> [retrieved on 20190327]
  • See also references of WO 2021139572A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 4090014 A1 20221116; EP 4090014 A4 20240103; CN 114450945 A 20220506; CN 115314710 A 20221108; JP 2023509951 A 20230310; KR 20220122666 A 20220902; US 11843781 B2 20231212; US 2022360785 A1 20221110; US 2024056581 A1 20240215; US 2024056582 A1 20240215; WO 2021139572 A1 20210715

DOCDB simple family (application)

EP 20912114 A 20201229; CN 2020141080 W 20201229; CN 202080068055 A 20201229; CN 202210689703 A 20201229; JP 2022541305 A 20201229; KR 20227023785 A 20201229; US 202217858161 A 20220706; US 202318494880 A 20231026; US 202318494947 A 20231026